Fig. 6

a 2D numerical model with triangular elements. Current evolutions are monitored at locations 1 and 2. b Random varying chloride threshold applied at rebar surface. Alonso et al. (2000) with 0.39 < Cl_th< 1.16 (free Cl⁻ as %binder weight). c1 Evolution of current density at location 1 with time. c2 Current density at location 1 on the onset of depassivation. d1 Time evolution of current density at location 2. d2 Corrosion current density at location 2 on the onset of depassivation at location 2.